392 ANOPLURA. 



CASE other hand, deny the fact that these parasites are distinct, assert- 

 ing that one and the same species of Pedicukis, and no other, 

 infests all the races of man in every quarter of the globe ; and I 

 believe they add, that, even although they were found to be 

 distinct, the inference thence drawn is neither necessary nor 

 warranted. 



The enquiries, the chief results of which are displayed in this 

 Case, were undertaken for the purpose of ascertaining Avhat the 

 facts, in this respect, really were. Specimens were got from 

 different races all over the world, and the result of the exami- 

 nation was published in a paper that we read to the Royal Society 

 of Edinburgh a number of years ago (1861). That result was 

 to leave the matter very much as it was before. It proved suffi- 

 ciently that there were differences between the parasites of diffe- 

 rent races. They differ in colour according to the colour of the 

 people they inhabit. Those of the West African and Australian 

 are nearly black ; those of the Hindoo, dark and smoky ; those of 

 the Africander and Hottentot, orange ; those of the Chinese and 

 Japanese, yellowish brown ; of the Indians of the Andes, dark 

 brown ; of the Digger Indians of California, dusky olive, and 

 those of the more North American Indians near the Esquimaux, 

 paler, approaching to the light colour of the parasites oi the 

 European. Difference in shape is not so easily made out, for 



Claw of Pediculus capitis, from European. D:.to, from Indian of Andes 



the body being soft allows considerable variation, but there is 

 considerable difference in size, and also some in the proportions 



